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University of Toronto researchers break NVIDIA GPU ECC defenses with GPUThor Rowhammer attack

Researchers demonstrated a new Rowhammer variant called GPUThor that defeats NVIDIA's ECC memory protections on Ampere-class workstation GPUs, including the RTX A4000, A4500, A5000, and A6000. By using a non-uniform hammering pattern tuned to avoid triggering GDDR6's Target Row Refresh defenses, the attack generates far more bit flips than earlier concepts like GPUHammer, enabling denial-of-service conditions and root-level privilege escalation.

OpenAI Unveils Jalapeño Inference Chip Built With Broadcom

OpenAI revealed its first custom AI chip, called Jalapeño, claiming it delivers industry-leading speed and efficiency for inference workloads. The chip, co-developed with Broadcom, is set to be deployed in OpenAI's own infrastructure by year-end, with two more generations already in development.

Canada imposes 50% retaliatory tariffs on $20B of US goods

Canada confirmed a new round of tariffs matching Washington's 50% duties, covering more than 700 American products worth roughly $20 billion, set to take effect September 8. The move follows the collapse of trade talks last week, with both governments blaming each other for last-minute demands. Ottawa specifically doubled its tariff on U.S. steel and aluminum to 50% in direct response to similar U.S. levies.

Perplexity debuts on-device AI agent 'Portable Computer' with NVIDIA

Perplexity has released Portable Computer, an agentic AI tool that runs entirely on local hardware instead of the cloud, built in partnership with NVIDIA. It relies on compact models like Qwen 3.8 and NVIDIA Nemotron 3.5 Lightning to handle complex tasks on-device, and only reaches out to cloud-based models when needed, with user permission. The feature is currently available to Perplexity Pro and Max subscribers running NVIDIA's DGX Spark hardware, with RTX GPU support planned.

Nvidia rolls out DLSS 4.5 Ray Reconstruction to GeForce RTX cards

Nvidia has updated Ray Reconstruction, its AI denoiser-upscaler for ray tracing, to the second-generation transformer architecture used in DLSS 4.5 Super Resolution. The company says the new model handles 35% more compute and 20% more parameters than before, improving image quality and reducing ray-tracing artifacts with little to no performance cost. GeForce RTX owners can access the update immediately.

OpenAI's head of data centers Chris Malone departs amid infrastructure reorganization

Chris Malone, who led OpenAI's data center strategy after joining from Meta and Google in March 2024, has left the company. OpenAI confirmed it recently restructured its infrastructure organization, shifting oversight so that Malone no longer reported to President Greg Brockman but instead to VP Sachin Katti before his exit. The company says several other executives, including Uday Ruddarraju, Brent Mayo and Spas Lazarov, remain in charge of its data center efforts.

SpaceX to Power Starmind AI Project with NVIDIA's Vera Rubin Chips in Orbit

Elon Musk revealed on SpaceX's latest earnings call that the company's Starmind AI project will run on NVIDIA's Vera Rubin GPU architecture, both on the ground and eventually in orbit. Musk argued the NVL72 VR system design outperforms traditional rack-based computing setups and would be cheaper and more effective for SpaceX's needs.

Networking flaw in NVIDIA's OpenClaw exposes Ollama API to LLM poisoning

Researchers identified a security bug in NVIDIA's OpenClaw tool that allows attackers to reach the local model server through the Ollama API without authentication. This unauthenticated access can be leveraged to tamper with the AI agent's underlying model, leading to persistent corruption of its outputs.

Perplexity and Nvidia unveil offline AI agent that runs without cloud token fees

Perplexity and Nvidia have released an AI agent designed to run entirely on local hardware rather than through cloud-based inference, eliminating per-token usage charges. The system relies on on-device processing, letting users run agentic AI workflows without sending data to remote servers or paying ongoing API costs.

AI Talent Exodus Hits OpenAI and Google Unevenly as Nvidia Boosts Open-Weight Bets

Reports indicate OpenAI and Google are both losing key AI researchers to competitors and startups, though the departures are affecting each company differently in terms of scale and strategic impact. Separately, Nvidia has committed an additional $6 billion to support open-weight AI models, while rare-book dealers report a surge in sales tied to AI-era demand, alongside mixed feelings about that trend.

Cramer Says Apple's Higher Mac Prices Could Boost Profitability

On his CNBC Investing Club Morning Meeting, Jim Cramer discussed Apple's newly unveiled Mac Mini and Mac Studio, which feature upgraded chips for better AI performance. The new Mac Mini now starts at $899, a $100 increase reflecting higher memory and storage costs passed on to consumers.

Nvidia expands RTX Spark and ARM support to broaden PC gaming compatibility

Nvidia is gaining backing from more game studios for its RTX Spark technology and ARM-based chip architecture, signaling a shift toward wider hardware compatibility for PC gaming. This move could allow games to run more consistently across different laptop configurations, regardless of the underlying chip design.